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from compressor.conf import settings
from compressor.base import Compressor, SOURCE_HUNK, SOURCE_FILE
class JsCompressor(Compressor):
output_mimetypes = {"text/javascript"}
def split_contents(self):
if self.split_content:
return self.split_content
self.extra_nodes = []
for elem in self.parser.js_elems():
attribs = self.parser.elem_attribs(elem)
if "src" in attribs:
basename = self.get_basename(attribs["src"])
filename = self.get_filename(basename)
content = (SOURCE_FILE, filename, basename, elem)
else:
content = (SOURCE_HUNK, self.parser.elem_content(elem), None, elem)
self.split_content.append(content)
if "async" in attribs:
extra = " async"
elif "defer" in attribs:
extra = " defer"
else:
extra = ""
# Append to the previous node if it had the same attribute
append_to_previous = self.extra_nodes and self.extra_nodes[-1][0] == extra
if append_to_previous and settings.COMPRESS_ENABLED:
self.extra_nodes[-1][1].split_content.append(content)
else:
node = self.copy(content=self.parser.elem_str(elem))
node.split_content.append(content)
self.extra_nodes.append((extra, node))
return self.split_content
def output(self, *args, **kwargs):
if (
settings.COMPRESS_ENABLED
or settings.COMPRESS_PRECOMPILERS
or kwargs.get("forced", False)
):
self.split_contents()
if hasattr(self, "extra_nodes"):
ret = []
for extra, subnode in self.extra_nodes:
subnode.extra_context.update({"extra": extra})
ret.append(subnode.output(*args, **kwargs))
return "\n".join(ret)
return super().output(*args, **kwargs)
def filter_input(self, forced=False):
"""
Passes each hunk (file or code) to the 'input' methods
of the compressor filters.
"""
content = []
for hunk in self.hunks(forced):
# If a file ends with a function call, say, console.log()
# but doesn't have a semicolon, and the next file starts with
# a (, the individual files are ok, but when combined you get an
# error like TypeError...
# Forcing a semicolon in between fixes it.
if settings.COMPRESS_ENABLED or forced:
hunk += ";"
content.append(hunk)
return content
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